Steam ore-stamp



(No Model.) Y

C, W. TRENI-AIN.

STEAM ORE STAMP.

vNo. 5f/4,589.

l PAM.

Patented Jan.. ,5, 1897.v

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UNITED STATES PATENT OFFICE.

CHARLES IV. TREMAIN, OF PORTLAND, OREGON.

STEAM O RE-STAM P.

SPECIFICATION forming part of Letters Patent N o. 574,589, dated January 5, 1897.

Application filed March 5, 1894. ISerial No. 502,419. (No model.) V

To all whom t may concern:

Be it known that I, CHARLES IV. TREMAIN, a citizen of the United States, residing at Portland, Multnomah county, and State of Oregon., have invented a new and useful Improvement in Steam Ore-Stamps, of which the following is a specification, reference being had to the accompanying drawings as a part hereof. v

My invention relates to steam orc-stamps of the class for which I have heretofore obtained several Letters Patent of the United States; and the object of my present invention is to make certain improvements in such stamps for the purpose of perfecting the same, and such improvements consist of the following features:

In the first place I find it exceedingly difficult to make the piston-valve, which I use in connection with the cylinders of my stamp, fit steam-tight to prevent steam from'escaping before used, to overcome which defect I now combine with my piston-valve a double- D or slide valve.

Second. I provide an independent duct or passage-way for live steam to be admitted at boiler-pressure to the upper part of the cylinders above the piston-heads after the piston has been lifted above a certain point, to cushion the piston and prevent the same from striking the head of the cylinder and to start the piston back to strike the blow, and I further provide another independent passage for the live steam to be conducted to the end of the valve-chest to move or throw the valve. Heretofore I have used a single port for both these purposes, as shown in my Letters Patent No. 480,223, granted August 2, 1892, but I iind that a single port will not answer, as the steam when first admitted to the cylinderhead expands too much to be t to operate the valve with precision.

Third. I further provide my valve-chamber with passages or ducts to permit the steam that has been admitted into the end of such valve-chamber to move the valves, to exhaust independently of the steam in the cylinders.

Fourth. I desire to improve upon the means heretofore employed-by me for turning the stems. The teeth of the ratchet wheels through which the spiral stems or piston-rods formerly operated., as well as the points of the I spring-pawl engaging such ratchet-wheels, wear away in use too rapidly and then no longer operate satisfactorily. I modify the construction of said parts to overcome this difficulty. Y

Fifth. I desire 'to improve the cover of the battery through which the stems operate, so as to prevent the pulp from working out of the battery and prevent any lubricant from getting into the same.

All these improvements will be more fully explained hereinafter and are shown in the accompanying drawings above referred to.

In the drawings, Figure 1 is a side elevation of a stamp, the cylinders and valve therefor and the battery being shown in section. Fig. 2 is a vertical transverse section on a line B through the cylinders. Fig. 3 is another transverse vertical section on the line A of Fig. l. Fig. 4L is a plan of the cap or valve plate covering the tops of the cylinders, designated as 1 in Fig. 1. Fig. 5 is a plan of the tops of the cylinders with the said cap or valve plate removed. Fig. 6 is a plan and section through a line X X of Fig. l, being the mech.- anisrn for turning the stamps while operating; and Fig. 7 is a detail of the valve.

Referring now to such drawings again and to the figures designating the specific parts thereof, the steam enters through the pipe 2, (see Fig. 3,) ascends through the passageway 3, (same igure,) and enters the steamchamber 4 of the valve-chest, and, supposing the valve to be in the position shown, thence enters through the central passage G in the slide-valve into the passage 5. The steam now lifts the piston until the base thereof has passed and opened the passage 7, as seen in Fig. 1, and part of the steam enters the annular chamber S in the valve, escapes through little passages into the left end of the valve-chamber, and moves the valve to the right. The piston having been lifted a little further the port 9 is opened, through which steam enters into the cylinder above the piston-'head at boiler-pressure, and is there confined to cushion the piston and prevent the same from pounding against the cylinder- -head and to start the piston back to strike the blow, as above mentioned. The valve having been moved to the righ t, this-admits live steam to the under side of the piston in the right- IOO hand cylinder and at the same time opens the exhaust-ports for said cylinder, permitting the steam above the piston to exhaust through the port 12 and passage 13 and right-hand annular duct 14 of the piston-valve into the eX- haust-cham ber 15, and finally through the passage 1G and pipe 17 into the air. At the same time the left-hand annular chamber 8 of the valve is brought opposite the left-hand duct 1S at the ends of the exhaust-chamber, and the steam which has been used to throw the valve is allowed to exhaust. After the valve has moved to the right the passages 5 and 10, leading into the left-hand cylinder, and the left-hand D-valve 11 would be thrown into connection with each other, as shown in the right-hand cylinder, to permit the steam from below the piston to exhaust into the cylinder above the piston and there expand to throT the latter down. As, because of the position of the exhaust-ports 12, not all the steam admitted into the cylinder above piston can escape that remaining also serves as a cushion for the piston-head to strike against. The piston in the right-hand cylinder having been lifted above the valve-port the operation described of the left-hand cylinder repeats itself.

Both ends of the valve-chamber must be provided with cushions for the ends of the pistonvalve to strike against, and such cushions may consist of a disk of rubber or like serviceable material held in place by metallic plates or other contrivances.

The construction of the double-D or slide valve and the means employed for holding the ame on the piston-valve are apparent from Fig. 7.

The rod 19, screwed into the end of the piston-valve, has an eye in which to insert the point of the lever 20, hanging from a pin 21, and which lever when not in use drops out of the way. The object of said contrivances is to provide means for shifting the position of the valve.

31 (see Fig. 7) is a pin to hold the pistonvalve and prevent the same from turning when inserting said rod 19.

To prevent the binding of the glands of the stuffing-boxes on the piston rods or stems due to any inaccurate adjustment or tightening of such glands, the sleeves 22 of the glands or covers 23 of the stuffing-boxes are detached and such covers and sleeves adapted to form a ball-joint at their points of contact, as shown in Fig. 2. By this arrangement the binding effect of any inequality of adjustment of the glands is materially overcome.

The ratchet-Wheels and spring-pawl heretofore used by me as part of the mechanism for turning the stems are omitted and substituted by smooth-faced collars or wheels 2-1 and the spring-clutch 25, bolted at its center to a block 26, so as to leave 'two free members or arms, each of which is faced at its end with rubber or other friction material 31, thus allowing such wheels 24: to freely move in one direction whilethe stamps are lifted, but binding and holding such wheels 2-1 as the stamps descend.

The center or eye of the wheels 2i is provided with a recess 27 (shown by dotted lines) and holds a disk 32 of Babbitt metal, having a central opening corresponding with the sectional configuration of the angular portion 33 of the stamp-stems, which move up and down in such wheels, turning such stems the same as heretofore, and I have found it -most practicable to face the holes in the Babbitt metal, through which the spiral or angular portions of the stems operate, with a gib, sleeve, or sheeting 3i, of copper, brass, or like suitable material, to save wear and afford ready means for keeping these parts in good operative condition.

The cover for the battery consists of a separate plate 28,11aving pockets 29, provided with a central opening through which the stems operate. The pockets 29 are filled with sponge or suitable material and are kept flooded through a pipe 30 with some of the water fed to the battery. This arrangement is contrived, as stated above, to prevent the pulp in the battery from Workin g out as the stamps are lifted, and also to prevent any lubricant from working into the battery. I

Having thus described my invention, I claim as follows:

1. The combination in a steam-stamp, with the cylinders and the pistons therein, and a single valve controlling the ports admitting steam into said cylinders, of one independent set of ports and ducts for conducting into the valve-chamber to move said valve, a portion of the live steam admitted into the cylinder below the piston to lift the stamp, and another independent set of ports and ducts for conducting another portion of said live steam from the under to the upper side of the piston in said cylinder to cushion the piston-head, and prevent the same from striking against the cylinder-head, and also to start the piston back substantially as set forth.

2. In a stamp the combination with the spiral stems of the smooth-faced wheels or collars having a central opening corresponding to the spiral of the stamp-stems, which operate therein as described, and antifriction facing or sleeve in the eye of such wheels for the spiral stems to operate in,and means adapted to allow such wheels to move in one direction but bind and hold the same if moved in the opposite direction, substantially as set forth and for the purposes described.

3. In a stamp the combination with the spiral stems of the smooth-faced wheels or collars having a central opening, corresponding to the spiral of the stamp-stems, which operate therein as described, and antifriction facing or sleeve in the eye of such wheels for the spiral stems to operate in; and a springclutch secured at its center and having two arms or members each faced at its end with some friction material and adapted toallow IOO IIC

said Wheels to move in one direction, but bind and hold the same if moved in the opposite direction substantially as set forth, and for the purposes described.

4. In a steam-stamp, in combination, two cylinders and pistons therein, a valve-ehest on said cylinders, and a single piston-valve in such chest, having ports 8, 11, and provided with a double-D or slide valve controlling the ports admitting steam into said cylinders respectively; independent. steam and exhaust chambers within said valve-chest; pipe 2 and passage 3 leading into such steam-chamber; duets and passages as 5, 7, 9, 10, and 12, 13 14, 15, 1G, 17 furnishing communications between such cylinders and Valve-chest, and providing ingress and egress for the steam operating the pistons within said cylinders; and ports S and 18 for permitting the steam CHARLES IV. TREMAIN.

lVitnesses:

T. J. GEISLER, 1V. M. GREGORY. 

